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DTC SET CONDITIONS Logic Flow Chart AK603767 AA00 No No No No Yes Yes Yes Yes Good Malfunction Monitoring conditions Specified times monitored? Rf < R1 Rf > R0 End Start Calculate frequency of front oxygen sensor output signal (Ff) Calculate frequency of rear oxygen sensor output signal (Fr) Calculate frequency ratio (Rf = Fr/Ff) Calculate average frequency ratio (Rf = Fr/Ff) of specified times Check Conditions ⦆ Engine speed is lower than 3,000 r/min. ⦆ Accelerator pedal is open. ⦆ Mass airflow is between 10 and 35 g/sec. ⦆ More than 3 seconds have elapsed after the above- ⦆ Intake air temperature is higher than -10°C (14°F). MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-455 DIAGNOSTIC TROUBLE CODE PROCEDURES |